x^2+.012x-.0039=0

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Solution for x^2+.012x-.0039=0 equation:


Simplifying
x2 + 0.012x + -0.0039 = 0

Reorder the terms:
-0.0039 + 0.012x + x2 = 0

Solving
-0.0039 + 0.012x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '0.0039' to each side of the equation.
-0.0039 + 0.012x + 0.0039 + x2 = 0 + 0.0039

Reorder the terms:
-0.0039 + 0.0039 + 0.012x + x2 = 0 + 0.0039

Combine like terms: -0.0039 + 0.0039 = 0.0000
0.0000 + 0.012x + x2 = 0 + 0.0039
0.012x + x2 = 0 + 0.0039

Combine like terms: 0 + 0.0039 = 0.0039
0.012x + x2 = 0.0039

The x term is 0.012x.  Take half its coefficient (0.006).
Square it (0.000036) and add it to both sides.

Add '0.000036' to each side of the equation.
0.012x + 0.000036 + x2 = 0.0039 + 0.000036

Reorder the terms:
0.000036 + 0.012x + x2 = 0.0039 + 0.000036

Combine like terms: 0.0039 + 0.000036 = 0.003936
0.000036 + 0.012x + x2 = 0.003936

Factor a perfect square on the left side:
(x + 0.006)(x + 0.006) = 0.003936

Calculate the square root of the right side: 0.062737549

Break this problem into two subproblems by setting 
(x + 0.006) equal to 0.062737549 and -0.062737549.

Subproblem 1

x + 0.006 = 0.062737549 Simplifying x + 0.006 = 0.062737549 Reorder the terms: 0.006 + x = 0.062737549 Solving 0.006 + x = 0.062737549 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.006' to each side of the equation. 0.006 + -0.006 + x = 0.062737549 + -0.006 Combine like terms: 0.006 + -0.006 = 0.000 0.000 + x = 0.062737549 + -0.006 x = 0.062737549 + -0.006 Combine like terms: 0.062737549 + -0.006 = 0.056737549 x = 0.056737549 Simplifying x = 0.056737549

Subproblem 2

x + 0.006 = -0.062737549 Simplifying x + 0.006 = -0.062737549 Reorder the terms: 0.006 + x = -0.062737549 Solving 0.006 + x = -0.062737549 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.006' to each side of the equation. 0.006 + -0.006 + x = -0.062737549 + -0.006 Combine like terms: 0.006 + -0.006 = 0.000 0.000 + x = -0.062737549 + -0.006 x = -0.062737549 + -0.006 Combine like terms: -0.062737549 + -0.006 = -0.068737549 x = -0.068737549 Simplifying x = -0.068737549

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.056737549, -0.068737549}

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